Key Teaching Points Flashcards
nucleus
a positively charged region at the center of the atom
protons
Positive Charge
neutrons
Neutral charge
electrons
Negative charge
Alpha
2 protons+2 neutrons
+2 charge
stopped by paper
Beta
Electron
-1 charge
stopped my a sheet of aluminuim
Gamma
Electromagnetic Waves
0 charge
Reduces by a meter of lead or concrete
radiocarbon
Carbon dating is a way of telling the age of a once living thing by measuring the amount of carbon inside of it
Rutherford’s Gold Foil Experiment- What happened
When he shot a beam of alpha particles at a sheet of gold foil, a few of the particles were deflected
Significance of Rutherford’s experiment
- atom has mostly empty space
- it has a nucleus
- the nucleus is small, heavy, positivly charged and in the center
What did Marie and Pierre Curie measure radioactivity
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reactant
Starting materials on the left hand side of the equation
Product
The end result of the reaction and is written on the right hand side of the equation
Role of energy in chemical reactions
breaking the bonds of the reactants or in the formation of new bonds.
Exothermic
release energy from the chemicals into the surroundings ( Heat)
ie Handwarmers
Endothermic
Absorbing energy from chemicals in the surroundings (cold)
Ie icepack
conservation of mass
mass is neither created nor destroyed in chemical reactions
Acids
A chemical that gives off hydrogen ions in water and forms salts by combining with certain metals
Acid Metal Reaction
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Acid Base Reaction
Neutralisation
Acid Carbonate Reaction
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Respiration
breathing
GLUCOSE+OXYGEN–> CARBON DIOXIDE+WATER+ENERGY
Photosynthisis
Carbon Dioxide+water—sunlight–> glucose+oxygen
microorganisms
an organism that is microscopic.
They help digest your food, protect you against infection and maintain your reproductive health
predator
an animal that lives by killing and eating other animals
Prey
an animal that is hunted or killed by another animal for food
parasites
an animal or plant that lives in or on another animal or plant and gets food or protection from it.
competitors
a set of interactions between different populations or individuals from the same population to get one or more resources from the ecosystem
pollinators
pollina anything that helps carry pollen from the male part of the flower (stamen) to the female part of the same or another flower (stigma)tors
Bushfire
an unplanned vegetation fire.
drought
acute water shortage
flooding
an overflow of water beyond the normal limits of a watercourse
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